21022112204 has 24 divisors (see below), whose sum is σ = 37826157600. Its totient is φ = 10216545920.

The previous prime is 21022112197. The next prime is 21022112207. The reversal of 21022112204 is 40221122012.

It is not an unprimeable number, because it can be changed into a prime (21022112207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194144 + ... + 282375.

It is an arithmetic number, because the mean of its divisors is an integer number (1576089900).

Almost surely, 2^21022112204 is an apocalyptic number.

It is an amenable number.

21022112204 is a deficient number, since it is larger than the sum of its proper divisors (16804045396).

21022112204 is a wasteful number, since it uses less digits than its factorization.

21022112204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476833 (or 476831 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21022112204 its reverse (40221122012), we get a palindrome (61243234216).

The spelling of 21022112204 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred four".